I agree with Yote. Remember they are herbivores and need lots of vegetable matter. I feed my tank everyother day but feed dried seaweed on the off days for the tangs. Where are the pics?
When it`s white and stringey then it`s usuall internal parasites. They make a fish food that you can feed your fish that treats for internal parasites. Cant remember if it was at petsmart or petco but one of them had it.
It`s not a good idea to do a complete PWC in SW. The chemical make up is changed so drastically. You are better to do frequent PWC`s so as not to change the make up of the water. FW might be different.
Matt, How can you have a nice looking tank like that and be bored? With a tank like that you`ll get NO sympathy from me. LOL. Get some new fish Matt. Are the clowns killing the other fish? If so they need to go.
I have some corals that are 12 yrs old. They have grown 4 to 5 times during that span but you would never be able to tell the difference in two months. Maybe 1 to 2 yrs.
BTW it`s not a dumb question at all.
I would also recommend the BTA. Just so you know there is no guarantee your clown will host the anenome. When I got it my clowns would totally ignore my anenome. I finally took it back to the LFS. I know of several others that had the same experience.